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TWENTIES : EU projectMassive integration of renewable
T&D Smartgrids How cable dynamics may help ?
ISCD 2011- Shanghai- October 18th, 2011Jean-Louis Lilien
Real-life examples: Twenties
Largest EU funded project in electricity sector ever
Focused on the technologies that will allow the large scale integration of renewable energy sources
Real-life demonstrations
www.twenties-project.eu
TWENTIES EU project
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Power lines basic principles (1)Power lines similar to violoncello
The wind is the bow
Power lines basic principles (2)power line similar to pendulum
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M The mass does not influence
the frequencies, only sag does
Power lines and sag limit
Clearance requiredsag
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Power transfer on a line is constrained by considerations of stability, voltage but most generally by thermal/clearance limitations.
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The current rating is determined by the sag or
annealing properties of the conductor.
For public safety, clearance above ground or obstacles
must always be met.
Key Information
Smart sensor for RTM System Components
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Live !
Vibration Analysis Sag !
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Fundamental Frequency
[Hz]
Sag [m]
0.1367 ± 4 10-4
16.40 ± 0.1
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2 328
2f
gs
TLgms
mT
Lkfk
==
=
No conductor data
No topological data
No sagging data
No weather data
= No Calibration !
Sag Validation by Topography
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Sag Evolution over one Month
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04/04 04/11 04/18 04/2513
13.5
14
14.5
15
15.5
16
16.5
17
17.5
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time [mm/dd]
sag [
m]
RTE / canton 316-176 / portée 149-150 / module 6
00:00 06:00 12:00 18:00 00:000
500
1000
1500
2000
2500
3000
3500
4000
4500
Time [HH:MM]
Cou
rant
de
ligne
Ampacity on 30-May-2009 (IEEE auto-switch) : module no.2 / EBAW
Courant de lignecourant max t
inf sans mesure Ampacimon
courant max tinf
avec corr. météo
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Ampacimon RT Ampacity
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• Ampacimon determines RT Ampacity using the IEEE thermal model with adjusted effective ambient parameters (wind speed), making full profit of the intrinsic accuracy of the Ampacimon vibration monitors to measure the Sag.
• The sag - conductor temperature equation (State Change Equation)is set by recent measured values instead of installation values that may have become inaccurate.
• Ampacimon integrates the Ruling Span concept while measuring locally on potentially critical spans for optimum accuracy.
• Ampacimon RT Ampacity is dynamic, assisting the dispatching operator safely and efficiently in Congestion Management & DLR.
• Commissioning is fast: < 4 weeks with no calibration needs towards transit intensity.
Season Histogram Actual Current & Ampacity
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0 500 1000 1500 2000 2500 30000
5
10
15
20
25
30
35
40
45
50Winter 2009 : 15 LFRS Theix current/ampacity occurences when module switched on
Current / Ampacity smoothed (SECURE states ignored)
Occ
uren
ces
[%]
& W
ind
spee
d [m
/s]
Actual current
Max allowable currentCorresponding Perp. WS
0 500 1000 1500 2000 2500 30000
5
10
15
20
25
30
35
40
45
50Summer 2010 : 15 LFRS Theix current/ampacity occurences when module switched on
Current / Ampacity smoothed (SECURE states ignored)
Occ
uren
ces
[%]
& W
ind
spee
d [m
/s]
Actual current
Max allowable currentCorresponding Perp. WS
48 hours météo forecasting, from worldwide available data to local data simulation
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Advantages of smart sensors
DIRECT Monitoring of Critical spans using Vibration Monitors to measure the Sag
Intrinsic Accurate Sag measurement: NO calibration, NO parameters SAFETY garanty
REAL Ampacity determination, with short term prediction
FAST installation on LIVE Lines – no line modification, no maintenance
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Advantages of the smart sensor
Autonomous Electrical power from line by magnetic induction
Secure data communication over GPRS / internet to TSO dispatching (TASE2 / Modbus / IEC61850 / DNP3)
Easy scada integration
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Experience at ELIA (BE) 400 kV
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Conclusions
Cable dynamics can be used for integration of renewable into the power network which helps to do :
Dynamic online managment of your Transportation networks
Improvement of the profitability of your investments
Facilitate the introduction of renewable producers
Reliable input for forecasting tools
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